Proposed Merger with Almost Family - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Nov. 15, 2017	Mar. 31, 2018
Subsequent Event [Line Items]
Equity interest issued or issuable, number of shares	0.9150
LHCG Stockholder Ownership	58.50%
Subsequent Event [Member]
Subsequent Event [Line Items]
Contingent termination fee		$ 30
Contingent termination fee by parties		$ 5
Almost Family [Member]
Subsequent Event [Line Items]
AFAM Stockholder Ownership	41.50%